Policy Gradients 
 Notes on the maths for this increasingly popular reinforcement learning technique. 

 Softmax gradients for ANN 
 Notes on how to estimate the derivatives for a multi-layer NN for classification. 

 Tensorflow Basics 
 A brief tutorial on Tensorflow's key concepts for model optimization. 

 Oil wells production trends 
 A jupyter notebook with some oil production analysis (Spanish). 

 Colorful blockchain presentation 
 As the title implies...